What usually causes it
- A gas cap that is missing, loose or damaged
- A hose that has come off or cracked
- A rusty or cracked filler pipe
- A vent or purge valve stuck open
- A cracked charcoal canister, the box that stores the fumes
P0455Starts at: OK to drive, fix when convenient
Fuel vapor system has a large leak
The EVAP system traps gas fumes from the fuel tank so they do not escape into the air. The computer found a large leak or an opening in it.
Check this first
Make sure the gas cap is on and tighten it until it clicks. Check the cap seal for cracks. The light can take a few days of driving to turn off.
What to watch for
- A strong smell of gas
- Fuel dripping under the car
- Trouble filling the tank
Can I keep driving?
We rate P0455 as OK to drive, fix when convenient, as a starting point. Keep an eye on the signs below. If the light starts flashing, stop driving soon.
Quick answers about P0455
What does P0455 mean?
Fuel vapor system has a large leak. The EVAP system traps gas fumes from the fuel tank so they do not escape into the air. The computer found a large leak or an opening in it.
Can I keep driving with P0455?
We rate P0455 as OK to drive, fix when convenient, as a starting point. Keep an eye on the signs below. If the light starts flashing, stop driving soon.
What usually causes P0455?
The most common causes, in order: A gas cap that is missing, loose or damaged; A hose that has come off or cracked; A rusty or cracked filler pipe; A vent or purge valve stuck open; A cracked charcoal canister, the box that stores the fumes.
Estimates only. A mechanic should confirm. The same code can mean slightly different things on different cars; the app explains it for your exact year, make, model and mileage.